JP2003200364A - Hand-held machine tool with casing having air inflow and/or air outflow openings - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hand-held machine tool with a casing having an air inflow opening or an air outflow opening. <P>SOLUTION: An improvement to a model in which openings 5 and 7 are positioned in respective different regions of a casing 3 and are oriented in respective different directions makes an air inflow opening or an air outflow opening directionally adjustable in the casing so that air suctioned into the casing or emitted from the casing acts without defect during a machine operation. A cover 13 is movably supported on the casing 3, so that the cover 13 can close a part of the openings 5 and 7. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hand-held machine tool having an air inflow opening or an air outflow opening in a casing, and these openings are arranged in different regions of the casing. , Each of which is directed in a different direction.

[0002]

2. Description of the Related Art Electric hand-held machine tools, such as drivers, punches, drill hammers or hammers,
In saws, grinders, etc., in principle a fan is arranged, which draws in cold air from the outside or through heated air through openings in the casing in order to cool the motor and the transmission. Is discharged to the outside. For example, the first German patent application publication
As can be seen from 9626245, the air inlet openings or air outlet openings are distributed along the circumference of the casing of the hand-held machine tool, so that the openings point in different directions. That is, in the operating state of the handheld machine tool, air is sucked in or discharged from all directions at all times, that is, from all directions surrounding the casing.

In some applications of hand-held machine tools,
It can be a drawback that air is drawn into the casing from multiple directions or discharged in multiple directions. It is inconvenient if hot air is discharged toward the face or body of the worker of the handheld machine tool. In this case, depending on whether the worker is left-handed or right-handed, it is desirable that air be discharged in a direction not facing the worker. Similarly,
It is also inconvenient for air to be sucked into the casing of a hand-held machine tool by dust or shavings, or for the air stream discharged from the casing to impinge on the dust or shavings, which is significantly uncomfortable for the operator. It can happen.

[0004]

[Patent Document 1] German Patent Application Publication No. 196
26245 Specification

[0005]

SUMMARY OF THE INVENTION The object of the invention is therefore to improve a hand-held machine tool of the type mentioned at the outset with an air inlet opening or an air outlet opening in the casing, which is sucked into the casing. Alternatively, it is an object of the present invention to provide such that the air inlet opening or the air outlet opening can be orientated in the casing, respectively, so that the air discharged from the casing can operate smoothly during the operation of the machine.

[0006]

According to the device of the present invention for solving this problem, the cover is movably supported by the casing, and a part of the opening can be closed by the cover.

[0007]

According to the present invention, the intake air or the discharge air does not obstruct the direction of the air inflow opening or the air outflow opening with a simple means during the operation of the handheld machine tool. , Can be changed.

Advantageous embodiments of the invention are apparent from the dependent claims.

Advantageously, the openings are distributed along a path that surrounds the casing in a ring-shaped manner, and the cover only partly supports the ring-shaped path, which is movably mounted along the path. It is formed as an unenclosed strip of elastic material.

Advantageously, the strips forming the cover are guided in grooves at both edges, which grooves are
It is integrally molded with the casing on both sides of the ring-shaped path.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Next, embodiments of the present invention will be described in detail with reference to the illustrated examples.

FIG. 1 is a side view of a punching machine as an embodiment of a hand-held machine tool 1. A plurality of air inflow openings or air outflow openings are distributed along the circumference of the casing 3, for example two openings 5, 7 are shown in the side view of FIG. As can be seen from the cross section of the casing 3 of the hand-held machine tool shown in FIG. 2 taken along the line AA, two openings 9, 11 are provided on the side of the casing 3 opposite to the openings 5, 7. It is provided. The invention is not limited to a particular number and shape of openings 5, 7, 9, 11. The openings 5, 7, 9, in the casing 3,
Eleven positions can also be realized in many embodiments.
Of course, the openings are preferably arranged so that air can be sucked in or discharged through the openings in different directions as much as possible.

A cover 13 is movably supported on the casing 3 so as to be slidable in this case.
It is possible to close off selectable parts of the openings 5, 7, 9, 11. In short, the cover 13 is moved onto the openings 5, 7, 9, 11 which are inconvenient for air inflow or air outflow when the handheld machine tool 1 is in operation. Of course, the cover 13 has all the openings 5, 7, 9, 1.
It must be formed so that one is not simultaneously closable and at least one of the existing openings remains unclosed.

According to a particularly advantageous practical embodiment of the cover 13, the openings 5, 7, 9, 11 are distributed along a path that surrounds the casing 3 in a ring shape.
The cover 13 can thus be formed as a strip, which is mounted movably along this path and which only partially surrounds the ring-shaped path. In Figure 2,
Transverse section AA of the casing 3 in the region of the cover 13
Is shown, in which a cover 13 partially surrounding the casing 3 is shown.

Advantageously, the cover 13 is made of an elastic material, for example sheet metal. Therefore, the cover 13
Can be adapted to the shape of the casing, which is generally not round, which results in a cover which is as close as possible to the openings 5, 7, 9, 11. Strip-shaped cover 13
Are guided on both longitudinal edges into grooves 15, 17 which are located on both sides of the ring-shaped path of the casing 3 provided with the openings 5, 7, 9, 11. , Molded integrally with the casing 3.

As shown in FIGS. 1 and 2, the cover 13 can be guided outside the casing 3 along the inside of the casing.

As shown in FIG. 2, the cover 13 is advantageously provided with a concave grip 19 with corrugated grooves which simplifies the movement of the cover.

As an alternative to the embodiment described, it is also possible to use as the movable cover a swivelable or rotatable cover whose part of the opening can be closed.

[Brief description of drawings]

FIG. 1 is a side view showing an electric machine tool including a cover movably supported along a casing.

2 is a cross-sectional view along line AA of FIG. 1 showing the casing in the region of the movably supported cover.

[Explanation of symbols]

1 handheld machine tool, 3 casings, 5, 7,
9,11 openings, 13 covers, 15,17 grooves,
19 concave grip

Claims (3)

[Claims] 1. A hand-held machine tool having an air inflow opening or an air outflow opening (5, 7, 9, 11) in a casing, wherein these openings (5, 7, 9, 11) are casing ( In a type in which the openings (5, 7, 9, 11) are arranged in different areas of 3) and the openings (5, 7, 9, 11) are directed in different directions, the cover (13) is movable on the casing (3). Is supported by the cover (13) and the openings (5, 7, 9,
A hand-held machine tool characterized in that a part of 11) can be closed. 2. The openings (5, 7, 9, 11) are distributed in a ring shape along a path surrounding the casing, and the cover (13) is movably supported along the path. 2. The hand-held machine tool according to claim 1, wherein the hand-held machine tool is formed as a strip of elastic material that only partially surrounds the ring-shaped path. 3. The strips forming the cover (13) are guided in the grooves (15, 17) at both edges,
Hand-held machine tool according to claim 2, characterized in that these grooves (15, 17) are integrally formed in the casing (3) on both sides of the ring-shaped path.